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Janesville, Wisconsin Weather Forecast
Janesville, Wisconsin Weather
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Weather Forecast for Janesville, Wisconsin : Rock County
Issued: 3:07 am CST Dec 21, 2025 Latitude: 42.6827885 Longitude: -89.0187223 View on Google Maps

MouseOver for Detail Forecast
Overnight Sunday Monday Tuesday Wednesday Christmas Day Friday Saturday
Clear on Overnight Sunny on Sunday Mostly Cloudy on Monday Partly Sunny on Tuesday 20% chance of rain on Wednesday 20% chance of rain on Christmas Day Mostly Cloudy on Friday Mostly Cloudy on Saturday
Low: 11°F High: 27°F High: 37°F High: 41°F High: 42°F High: 47°F High: 38°F High: 39°F
Low: 21°F Low: 32°F Low: 26°F Low: 35°F Low: 32°F Low: 28°F  
Clear Sunny Mostly Cloudy Partly Sunny Rain Rain Mostly Cloudy Mostly Cloudy
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Current Conditions at
JANESVILLE - (KJVL)
16°
Feels like 4°F
Clear
as of 3:10 AM CST
Rel. Humidity: 61%
Dew Point: 5°F
Visibility: 10 Miles
Pressure: 30.29 in.
Flight Rule: VFR
Wind Data
9 MPH
320° Northwest
Cloud Level(s): Clear
Current Conditions at
MONROE - (KEFT)
14°
Clear
as of 3:15 AM CST
Rel. Humidity: 66%
Dew Point: 5°F
Visibility: 10 Miles
Pressure: 30.26 in.
Flight Rule: VFR
Wind Data
7 MPH
330° Northwest
Cloud Level(s): Clear
Current Conditions at
ROCKFORD - (KRFD)
18°
Clear
as of 2:54 AM CST
Rel. Humidity: 67%
Dew Point: 9°F
Visibility: 10 Miles
Pressure: 30.30 in.
Flight Rule: VFR
Wind Data
8 MPH
300° Northwest
Cloud Level(s): Clear
Current Conditions at
MADISON - (KMSN)
12°
Clear
as of 2:53 AM CST
Rel. Humidity: 56%
Dew Point: -0°F
Visibility: 10 Miles
Pressure: 30.28 in.
Flight Rule: VFR
Wind Data
8 MPH
320° Northwest
Cloud Level(s): Clear
Clear on Overnight Overnight... Clear, with a low around 11. Northwest wind 5 to 10 mph.

Sunny on Sunday Sunday... Sunny, with a high near 27. Calm wind becoming southwest around 5 mph in the afternoon.

Increasing Clouds on Sunday Night Sunday Night... Increasing clouds, with a low around 21. South wind 5 to 10 mph.

Mostly Cloudy on Monday Monday... Mostly cloudy, with a high near 37. South wind 5 to 10 mph.

Mostly Cloudy on Monday Night Monday Night... Mostly cloudy, with a low around 32. South wind around 5 mph becoming west after midnight.

Partly Sunny on Tuesday Tuesday... Partly sunny, with a high near 41. West wind around 5 mph.

Mostly Cloudy on Tuesday Night Tuesday Night... Mostly cloudy, with a low around 26. Calm wind becoming southeast around 5 mph after midnight.

20% chance of rain Wednesday Wednesday... A 20 percent chance of rain after noon. Cloudy, with a high near 42. Southeast wind around 5 mph.

20% chance of rain Wednesday Night Wednesday Night... A 20 percent chance of rain before midnight. Cloudy, with a low around 35.

20% chance of rain Christmas Day Christmas Day... A 20 percent chance of rain after noon. Cloudy, with a high near 47.

20% chance of rain Thursday Night Thursday Night... A 20 percent chance of rain. Cloudy, with a low around 32.

Mostly Cloudy on Friday Friday... Mostly cloudy, with a high near 38.

Mostly Cloudy on Friday Night Friday Night... Mostly cloudy, with a low around 28.

Mostly Cloudy on Saturday Saturday... Mostly cloudy, with a high near 39.

Current Radar Image


Sun Almanac for Janesville, Wisconsin
Sunrise: 07:23 AM
Sunset: 4:25 PM
Civil Sunrise:06:51 AM
Civil Sunset: 4:58 PM
Nautical Sunrise: 06:15 AM
Nautical Sunset: 5:33 PM
Astro Sunrise: 05:41 AM
Astro Sunset: 6:08 PM
Any use of the information on this page is at your own risk. This information should not be relied upon in life-threatening situations, potential financial loss situations or in lieu of any officially disseminated information. Visit the National Weather Service for official information.